... PE,PB,PVC,PEPPropertyLight weight, certain permeability, pervious to light quality, with tensile power, ageing resistance, corrosion resistance, ... radiationCharacteristicsFlat and smooth surface, pure, have qualitative light feeling, flexible moderate, elasticColorBlack, silver gray, white ,blue ... cover the earth(1)In summer,to block the light, the rain, protect wet cooling (2)In winterand spring , ...